Maintenance-Object Repair Procedures
555-233-143
8-158 Issue 1 May 2002
System Technician-Demanded Tests:
Descriptions and Error Codes
Always investigate tests in the order presented in the following tables when
inspecting errors in the system. For example, by clearing error codes associated
with the ASAI Port Local LAN Looparound test (#618), you may also clear errors
generated from other tests in the testing sequence.
BRI Port Local LAN Loop-Around Test (#618)
This test is destructive.
This test verifies the connectivity of a BRI port across the LAN Bus and executes
only if the port is out-of-service. The test aborts if calls associated with the port
are in-progress. Failures of this test indicate either on-board faults associated
with the ASAI-PT hardware on the circuit pack or problems with the LAN Bus,
which is used to form connectivity between the switch and the ASAI-PT.
The dotted lines in Figure 8-2 on page 8-159 show how a loop-around test is
performed across the packet bus for the D channel.
Table 8-60. System Technician-Demanded Tests: ASAI-PT
Order of Investigation
Short Test
Sequence
Long Test
Sequence D/ND
1
1. D = Destructive, ND = Nondestructive
ASAI Port Local LAN Looparound test (#618) X D
Level 1 Status Inquiry test (#621) X X ND
CRC Error Counter test (#623) X ND
Layer 1 Transmission Error Counter test (#624) X ND
Receive FIFO Overflow Error Counter test (#625) X ND
Clear Error Counters (#270) X X ND
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